Organic light emitting device

Abstract

An organic light emitting device and a method of fabricating the same are disclosed. The organic light emitting device includes an opaque substrate having one or more holes, and an organic emissive unit interposed between first and second electrodes positioned on the opaque substrate.

What is claimed is: 
     
       1. An organic light emitting device comprising:
 an opaque substrate having more than one hole, wherein an area of an upper surface of the holes passing through the opaque substrate is larger than an area of a lower surface of the holes; and 
 an organic emissive unit interposed between first and second electrodes formed on the opaque substrate, 
 wherein the holes are formed at only each edge of the opaque substrate in the form of through holes and have an inverted trapezoid-shaped vertical section. 
 
     
     
       2. The organic light emitting device of  claim 1 , wherein a shape of each of the holes is one of a circle, a cross, a triangle, a rectangle, a star, and a four-leaf clover. 
     
     
       3. The organic light emitting device of  claim 1 , wherein an angle formed by the base (longer side) and the side of each of the holes is equal to or more than 50° and less than 90°. 
     
     
       4. The organic light emitting device of  claim 1 , wherein the holes of the opaque substrate are used to align the opaque substrate with a shadow mask, and the size of one of the holes of the opaque substrate is larger than the size of a hole of the shadow mask. 
     
     
       5. The organic light emitting device of  claim 1 , wherein the opaque substrate is formed of at least one of stainless steel, invar, titanium (TI), molybdenum (Mo), or nickel (Ni). 
     
     
       6. The organic light emitting device of  claim 1 , further comprising a driver electrically connected to the first electrode. 
     
     
       7. An organic light emitting device comprising:
 an opaque substrate; 
 a pixel unit formed on the opaque substrate; 
 a first pad electrically connected to the pixel unit; 
 first alignment keys positioned at both sides of the first pad and passing through the opaque substrate, wherein an area of an upper surface of the first alignment keys passing through the opaque substrate is larger than an area of a lower surface of the first alignment keys; 
 a flexible substrate including a second pad electrically connected to the first pad; and 
 second alignment keys positioned at both sides of the second pad, wherein each of the second alignment keys has a center point at a location corresponding to a location of a center point of each of the first alignment keys, 
 wherein the first alignment keys are formed at only each edge of the opaque substrate in the form of through holes and have an inverted trapezoid-shaped vertical section. 
 
     
     
       8. The organic light emitting device of  claim 7 , wherein an angle formed by the base (longer side) and the side of each of the holes is equal to or more than 50° and less than 90°. 
     
     
       9. The organic light emitting device of  claim 7 , wherein the first and second alignment keys each have one of a circle and a polygon. 
     
     
       10. The organic light emitting device of  claim 7 , wherein the pixel unit includes an organic emissive layer formed between two electrodes, and
 the organic emissive layer emits light when a thin film transistor is driven by a driving signal supplied through the first pad.